# Neptune: Navigation Rules — USCG Exam & COLREGS Prep > USCG exam prep app with AI tutor, 3D visuals, and question bank. (iPhone/iPad app by Brice Brown.) - Source: https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315 (this page in markdown: same URL + `.md`) - Developer: [Brice Brown](https://appshunter.io/developer/1555846025) - Category: Education, Navigation - Price: Free (on sale, was $4.99) - Rating: 5.00/5 from 13 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 101 MB - Languages: American English - Released: 2026-01-20 - Data updated: 2026-09-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315/reviews.md ## What is Neptune? PASS YOUR USCG COLREG & OOD EXAMS WITH CONFIDENCE Neptune: Navigation Rules is the only modern study system that combines the official USCG Question Bank with an AI Tutor, interactive 3D Visual Training, and verbatim cards. Whether you are an Ensign preparing for OOD Phase 1 or a Captain refreshing for a renewal, Neptune replaces heavy textbooks with a smart, pocket-sized coach. NEW: VERBATIm MEMORY TRAINER Level up recall: hide key phrases and type them back to prove you know the rule, not just the letter. Adaptive drills: auto-submit when blanks are filled, with instant feedback and retries to lock in weak spots. Inline citations: jump straight from a missed phrase to the exact rule text. 3D LIGHTS & SHAPES TRAINER Stop memorizing static flashcards. Interactive 3D Models: Rotate vessels to see lights and shapes from any angle. Quiz Mode: Answer questions based on target angle, vessel ID, cardinal direction, and rules of the road. AI-POWERED REFERENCE Don't just memorize the answer—understand the Why. Ask Neptune: Chat with an AI trained specifically on COLREGS and over 500 maritime court cases. Instant Explanations: Get plain-English breakdowns for every question with citations to the rules and cases. Legal Context: Using the court cases see how rules are adjudicated in the real world. COMPLETE USCG QUESTION BANK & BOOK Official Pool: Full access to Inland and International questions. Smart Citation: Every question is linked directly to the specific Rule it tests. Custom Tags: Add your own notes, highlights and rule references. INTELLIGENT TEST MODES Exam Simulator: Mimic the real test by creating presets with precise filters for question number, specific words to be omitted, and rules. Or enable the Smart algorithm to dish you out trouble questions. Study Mode: Filter by "Least Confident" to drill the questions you get wrong. Daily Challenges: Keep your streak alive with quick, timed quizzes to build a daily study habit. ADVANCED PROGRESS TRACKING Confidence Scores: Visualize your mastery of every Rule based on SM-2 Algorithm. Heat Maps: Instantly see if you are weak on "Steering & Sailing" or "Sound Signals." Detailed History: Review past attempts to track your improvement over time. THE MODERN STANDARD Offline Ready: Study in the SCIF or underway—no internet required. Dark Mode: Fully optimized for night watch study sessions. Cloud Sync: Start on your iPhone, finish on your iPad. ## Key features - AI-powered tutor for rule explanations - Interactive 3D lights and shapes trainer - Official USCG question bank - Verbatim memory trainer - Intelligent exam simulator modes - Advanced progress tracking - Offline study capability ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315/reviews.md ### 5/5 — Super helpful! *2026-01-30* Hands down the best USCG test prep tool out there ### 5/5 — Absolutely Worth It *2026-01-24* Hands down one of the best COLREGS prep apps available. Straightforward, well-designed, and actually helps you understand the rules instead of just memorizing answers. Huge help for exams and real-world application. ### 5/5 — Best App Out Now *2026-01-23* Absolute lifesaver all around. Would definitely recommend!! ### 5/5 — Colregs goat *2026-01-23* Perfect for learning COLREGS🔥🔥🔥 ### 5/5 — Helpful *2026-01-23* This has been so informative and helpful for me! ### 5/5 — Great App for Studying! *2026-01-23* Strikes a really good balance between being easy to navigate and still having a good depth of material. A must-download for anyone looking to improve their exam scores! ### 5/5 — Great study tool *2026-01-21* This is a great tool to use for studying rules of the road. You are able to customize your study sessions and gain corrective feedback. This should be a no-brainer download for any SWO ### 5/5 — Wow *2026-01-21* Seems like every rules of the road costs money but this makes sense. The AI and features are so worth it, especially being able to highlight the book in the app and save pictures of my notes. Can’t wait to use it more ### 5/5 — BEST RULES APP HANDSDOWN *2026-01-20* Masterfully made. Haven’t gotten below a 90 since downloading! ### 5/5 — Awesome App *2026-01-20* Super helpful ## Frequently asked questions about Neptune ### What is Neptune's learning methodology? Neptune uses a multi-faceted approach including AI-powered explanations for understanding rules, interactive 3D models for visual learning of lights and shapes, and a verbatim memory trainer for rote memorization of key phrases. It also provides access to the official USCG question bank with smart citation. ### How does Neptune track user progress? Neptune offers advanced progress tracking with confidence scores for each Rule, heat maps to identify weak areas like 'Steering & Sailing,' and a detailed history to monitor improvement over time. This helps users focus their study efforts effectively. ### Can I use Neptune offline? Yes, Neptune is designed to be offline ready, allowing users to study in locations without internet access, such as underway or in secure facilities. This ensures consistent study regardless of connectivity. ### What devices does Neptune support? Neptune is available for iPhone, iPad, and iPod, with cloud sync functionality allowing users to start their study on one device and continue on another. This provides flexibility in study locations and times. ### Is Neptune suitable for all levels of USCG exam preparation? Yes, Neptune is designed for a range of users, from Ensigns preparing for OOD Phase 1 to Captains refreshing for renewals. It covers both Inland and International questions from the official USCG question bank. ### How often is Neptune updated? The latest version of Neptune is 1.2.2, and it was last updated on March 19, 2026. This indicates a commitment to providing current and reliable study material. ### What is the age rating for Neptune? Neptune has an age rating of 4+, making it appropriate for a wide range of users. The app focuses on educational content for maritime professionals. ### Does Neptune offer certifications? While Neptune provides comprehensive preparation for USCG exams, the app itself does not directly offer certifications. Its purpose is to equip users with the knowledge and confidence to pass official USCG examinations. ## Version history (last 5 releases) ### 1.2.2 — 2026-03-19 What is New Spaced Repetition (SM-2) - Neptune now schedules reviews based on your performance, surfacing weak topics more frequently Progress Dashboard - New mastery rings card showing your status across Rules, Lights, and Verbatim at a glance Mixed Daily Challenge - Daily sessions now combine COLREGs rules, verbatim recall, and vessel light questions Multi-Diagram Swipe Viewer - Questions can display multiple diagrams; swipe through them full-screen Unified Test Summary - Consistent end-of-session summary screen across all quiz types with per-topic breakdown Resume Verbatim Sessions - Pick up in-progress verbatim tests where you left off Flag Questions - Flag any question or rule during a session to review later New Vessel Lights - Added 12m and 7m power-driven vessel configurations; hull display enabled in the night viewer New Achievements - Verbatim Master and Night ID badges now trackable Study Walkthrough - Guided onboarding flow for new users UI Improvements - Redesigned picker sheets, smoother scroll behavior, better icons throughout Bug Fixes - Fixed stale question citation rows persisting after an app update - Fixed progress data not rebuilding correctly after deleting a session - Fixed sync errors caused by missing SM-2 columns on older installs - Fixed progress history not backfilling from older test sessions after sync - Fixed date normalization inconsistencies in the sync service - Fixed inline answer feedback incorrectly appearing in non fill-in exercises - Fixed null safety crashes across several study and progress screens - Fixed diagram colors and references loading incorrectly in the rule detail view ### 1.2.0 — 2026-02-08 + New Feature: Verbatim Repeat back cards for studying the key words of COLREG Rules + Upgraded progression tracking + Bug Fixes and UI Changes ### 1.1.0 — 2026-02-03 + New: 3D Vessel Trainer Master Lights & Shapes with our new interactive 3D models. Rotate vessels and toggle Day/Night modes to visualize complex scenarios instantly. + Fixes & Improvements ### 1.0.6 — 2026-01-25 Improvements and patched pipes ### 1.0.5 — 2026-01-23 Added Game Center for leaderboards and achievements Bug Fixes ## Apps similar to Neptune | App | Rating | Price | Category | | --- | --- | --- | --- | | [Electric Field Explorer](https://appshunter.io/ios/app/electric-field-explorer/id6757281793) | — | $1.99 | Education | | [Ladybug ABC](https://appshunter.io/ios/app/ladybug-abc/id6758678171) | 5.0 (1) | $0.99 | Education | | [Learn Arabic Alphabet & Script](https://appshunter.io/ios/app/learn-arabic-alphabet-and-script/id6758929160) | — | Free | Education | | [Master-Nav: COLREGS IALA Tests](https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000) | — | Free | Education | | [Learn English words: LexiMory](https://appshunter.io/ios/app/learn-english-words-leximory/id6758276554) | — | Free | Education | | [Owly: AI Study & Flashcards](https://appshunter.io/ios/app/owly-ai-study-and-flashcards/id6754908867) | 5.0 (9) | Free | Education | ## More apps by Brice Brown - [One By One: Mental Math](https://appshunter.io/ios/app/one-by-one-mental-math/id1555846023) - [Atomic Amasser \| Idle Sim](https://appshunter.io/ios/app/atomic-amasser-idle-sim/id1634962166) - [Space Inspector](https://appshunter.io/ios/app/space-inspector/id6783617599) All apps by Brice Brown: https://appshunter.io/developer/1555846025 ## Related topics [navigation rules](https://appshunter.io/ios/topics/navigation-rules) · [navigation rules pro](https://appshunter.io/ios/topics/navigation-rules-pro) · [hms colregcards](https://appshunter.io/ios/topics/hms-colregcards) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*